Lens limiting assembly, camera body and camera

ABSTRACT

A camera body comprises a fixing frame having a contact base mounting position and a lens limiting assembly arranged at the contact base mounting position. The lens limiting assembly comprises an elastic element arranged on the contact base mounting position, a lens assembly ring arranged on the elastic element, and a locking ring configured to abut against and press the elastic element when the locking ring rotates in one direction.

CROSS-REFERENCE TO RELATED APPLICATION

This is a continuation application of International Application No.PCT/CN2015/079521, filed on May 21, 2015, which claims the benefit ofpriority to International Application No. PCT/CN2014/089604, filed onOct. 27, 2014, the entire contents of both of which are incorporatedherein by reference.

TECHNICAL FIELD

The present disclosure relates to a lens limiting assembly, a camerabody comprising the lens limiting assembly, and a camera comprising thecamera body.

BACKGROUND ART

A camera includes a lens and a body in a fixed or detachable connection.To ensure the stabilization of imaging, it is desired to keep the flangefocal distance, i.e., the distance from the lens to an image sensor, asprecise as possible, so that the image can be stable and clear. Inexisting technologies, the lens is rotatably mounted to the body of thecamera and hooked by a lens assembly ring on the body. A lens releasebutton assembly is arranged at the lens assembly ring and inserted intothe lens to prevent the lens from falling off.

With the existing technologies, since the lens can rotate, a gap ofabout 0.05 mm usually exists between the lens and the body. Thus, if thecamera is used on a vibrating platform, it may lead to a poor contact,or even a failure, between the contact at the back and the camera lens.In addition, the flange focal distance of the lens may also change dueto the gap. To avoid the gap, a strip spring may be used, but the stripspring piece is not stable enough to guarantee a close fit.

SUMMARY

In one aspect, embodiments of the present disclosure provide a camerabody comprising a fixing frame having a contact base mounting positionand a lens limiting assembly arranged at the contact base mountingposition. The lens limiting assembly comprises an elastic elementarranged on the contact base mounting position, a lens assembly ringarranged on the elastic element, and a locking ring configured to abutagainst and press the elastic element when the locking ring rotates inone direction.

In another aspect, embodiments of the present disclosure provide acamera comprising a lens including a snapping body provided on an outerside of the lens and a camera body. The camera body comprises a fixingframe having a contact base mounting position and a lens limitingassembly arranged on the contact base mounting position. The lenslimiting assembly comprises an elastic element arranged on the contactbase mounting position, a lens assembly ring arranged on the elasticelement, and a locking ring configured to abut against and press theelastic element when the locking ring rotates in one direction. Thesnapping body is configured to be snapped below the elastic element whenthe lens is assembled in the lens assembly ring, and the elastic elementpresses the snapping body to lock the lens.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an assembled schematic diagram of a camera according to anexemplary embodiment.

FIG. 2 is an exploded schematic view of the camera shown in FIG. 1.

FIG. 3 is an exploded schematic view of the camera shown in FIG. 2.

FIG. 4 is an exploded schematic view of a limiting structure shown inFIG. 3.

FIG. 5 is a partially assembled schematic diagram of the limitingstructure shown in FIG. 4 assembled on the camera.

FIG. 6 is a sectional view of the camera in FIG. 5 taken along VI-VIline.

FIG. 7 is an exploded schematic view of a lens limiting assembly shownin FIG. 3.

FIG. 8 is an enlarged schematic view of part VIII in FIG. 7.

FIG. 9 is an assembled schematic diagram of a lens assembly ring shownin FIG. 4 with a locking ring.

FIG. 10 is an assembled schematic diagram of the lens limiting assemblyshown in FIG. 4.

FIG. 11 is a sectional view of the camera shown in FIG. 1 taken alongXI-XI line.

FIG. 12 is an enlarged schematic view of part XII in FIG. 11.

FIG. 13 is an exploded perspective view of a lens limiting assemblyaccording to another exemplary embodiment.

FIG. 14 is a schematic diagram of a rear side of a lens assembly ringshown in FIG. 13.

FIG. 15 is an assembled schematic diagram of the lens assembly ringshown in FIG. 14 with a locking ring.

FIG. 16 is a partially exploded perspective schematic diagram of acamera body according to another exemplary embodiment.

FIG. 17 is an assembly schematic diagram of the camera body shown inFIG. 16.

FIG. 18 is a perspective schematic diagram of a camera according toanother exemplary embodiment, before a lens being assembled with thecamera body.

FIG. 19 is a sectional view of the camera shown in FIG. 18 after thelens being assembled with the camera body.

FIG. 20 is an enlarged view of part XIX in FIG. 19.

DESCRIPTION OF REFERENCE NUMERALS FOR MAIN ELEMENTS

TABLE 1 Camera 300 Lens 310 Lens barrel 312 Assembly part 313 Snappingbody 314 Camera body 200 Fixing frame 210 Contact 215 First assemblyhole 216 Second assembly hole 217 Mounting column 2171  Stepped surface2173  Via hole 2174  Contact base mounting position 220 Locating pin 230Bolt 240 Limiting structure 250 Press key 251 Key body 2511  Firstsurface 2512  Second surface 2513  Snapping space 2514  Snapping part2515  First snapping arm 2516  First inclined surface 2517  Surface2518  Second snapping arm 2519  Limiting boss 253 Post 2531  Bracket2533  Shaft 2535  First supporting part 2536  Second supporting part2537  Limiting end 2538  Upper boss 2538a Lower boss 2538b Secondinclined surface 2538c Support end 2539  First elastic member 255 Secondelastic member 257 Lens limiting assembly 100 Elastic element  10Elastic body  11 Elastic arm  12 First end 121 Second end 123 Firstlocating hole  14 Snapping opening  16 Lens assembly ring  20 First endface  21 Second locating hole 211 Receiving groove 213 Second end face 23 Assembly hole 231 Bolt hole 233 Limiting part  25 Mounting part  27Locking ring  30 Body  31 Hook  33 Connecting part 331 Bent part 333Flange 335 Anti-slip part  35 Lens limiting assembly 500 Elastic element510 First locating hole 514 Second locating hole 528 Fitting hole 529Bolt hole 291 Snapping opening 516 Lens assembly ring 520 Locking ring530 Elastic arm 512 Limiting part 522 Receiving groove 527 First fittingface 524 Smooth surface 526 Hook 532 Connecting part 5321  Bent part5322  Second fitting face 534 Planar surface 536 Anti-slip groove 538Camera body 600 Fixing frame 610 Contact base mounting position 612Contact 620 Lens 700 Lens barrel 712 Assembly part 713 Snapping body 714Locating pin 721 Bolt 722 Telescopic limiting structure 650 Circular nut651 Post 652 Camera 800

DESCRIPTION OF THE EMBODIMENTS

Embodiments of the present disclosure will be described with referenceto the accompanying drawings. The described embodiments are only somerather than all of the embodiments of the present disclosure. All otherembodiments obtained by a person of ordinary skill in the art based onthe embodiments described here without creative efforts shall fallwithin the scope of the present disclosure.

FIG. 1 shows an exemplary camera 300 consistent with embodiments of thedisclosure. The camera 300 may be an ordinary camera with a detachablelens, a single-lens reflex camera, or a special-purpose camera, e.g., anaerial camera for using on an unmanned aerial vehicle. FIG. 2 shows thecamera 300 in a disassembled state. As shown in FIG. 2, the camera 300comprises a lens 310 and a camera body 200. The camera body 200comprises a lens limiting assembly 100, and the lens 310 can be mountedto the camera body 200 through the lens limiting assembly 100.

The lens 310 comprises a lens barrel 312. An assembly part 313 isarranged at a bottom end of the lens barrel 312. Three snapping bodies314 spaced apart from each other are arranged on an outer wall of theassembly part 313 and are used to cooperate with the lens limitingassembly 100.

FIG. 3 is a partially exploded view of the camera 300. As shown in FIG.3, the camera body 200 comprises a fixing frame 210, and the lenslimiting assembly 100 is arranged in the fixing frame 210. Contacts 215are arranged in the fixing frame 210 and are configured to beelectrically coupled to, e.g., a driver in the lens 310 when the lens310 is fastened and assembled on the camera body 200.

A plurality of contact base mounting positions 220 for assembling thelens 310 are provided on the fixing frame 210. The fixing frame 210further includes a locating pin 230, four bolts 240 and a telescopiclimiting structure 250.

In some embodiments, the number of the locating pins 230, the number ofthe bolts 240, and the number of the snapping bodies 314 are not limitedto the above numbers, and can be chosen according to actual needs.

FIG. 4 is an exploded view of the limiting structure 250. As shown inFIG. 4, the limiting structure 250 comprises a press key 251, a limitingboss 253, a first elastic member 255, and a second elastic member 257.The press key 251 is connected to the limiting boss 253. The firstelastic member 255 is arranged between the press key 251 and thelimiting boss 253. The second elastic member 257 is sheathed on thelimiting boss 253.

The press key 251 is movably arranged on a side surface of the camerabody 200, making it easy for a user to press. The press key 251comprises a key body 2511 and two snapping parts 2515 arranged on thekey body 2511. The key body 2511 includes a substantially cuboidstructure comprising a first surface 2512 and a second surface 2513arranged oppositely. The first surface 2512 is closer to the limitingboss 253, while the second surface 2513 is farther away from thelimiting boss 253. The two snapping parts 2515 extend in a directionperpendicular to the first surface 2512 from two locations close to twoends of the first surface 2512, respectively, and are arranged spacedapart from each other. The user can press the second surface 2513 tocontrol the press key 251. Each snapping part 2515 comprises a firstsnapping arm 2516 and a second snapping arm 2519 which are formedintegrally. A first inclined surface 2517 is formed at one side of thefirst snapping arm 2516. In some embodiments, the first inclined surface2517 inclines from the first surface 2512 of the key body 2511 in thedirection away from the first surface 2512, i.e., the width of the firstsnapping arm 2516 in a direction parallel to the first surface 2512decreases gradually from the first surface 2512 in the direction awayfrom the first surface 2512. The first snapping arm 2516 furthercomprises a surface 2518 opposite to the first inclined surface 2517. Insome embodiments, the surface 2518 includes a planar surface. The secondsnapping arm 2519 is arranged at the end of the first snapping arm 2516opposite to the first surface 2512, and is arranged substantiallyparallel to the first surface 2512. The second snapping arm 2519comprises a clamping edge 2510. The clamping edge 2510 extends from theside of the first inclined surface 2517 opposite to the first surface2512 in a direction parallel to the first surface 2512. A snapping space2514 is formed between the clamping edge 2510 and the first inclinedsurface 2517. The snapping space 2514 can be used to snap the limitingboss 253.

The number of the snapping parts 2515 is not limited to theabove-described number, and can be chosen according to actual needs.

The limiting boss 253 can be movably arranged in the camera body 200,and can be used to relatively limit the position of the lens 310. Thelimiting boss 253 comprises a post 2531, a bracket 2533, and a shaft2535. The post 2531 and the shaft 2535 are arranged at two oppositesides of the bracket 2533. The bracket 2533 includes an approximatelyinverted L-shaped structure, and comprises a first supporting part 2536and a second supporting part 2537, which are arranged approximatelyperpendicular to each other. The post 2531 is vertically arranged on oneside of the first supporting part 2536. The shaft 2535 is verticallyarranged on the other side of the first supporting part 2536 opposite tothe post 2531 and is arranged along a same straight line as the post2531. The second supporting part 2537 is arranged parallel to the keybody 2511 of the press key 251. A lower part of the second supportingpart 2537 includes two limiting ends 2538 at two sides of the supportingpart 2537 and a support end 2539 between the two limiting ends 2538. Thesupport end 2539 is thinner than an upper part of the second supportingpart 2537. The limiting ends 2538 and the support end 2539 can be formedby cutting inwardly from both sides of a middle lower position of thesecond supporting part 2537 to remove portions of the second supportingpart 2537. Each of the limiting ends 2538 comprises an upper boss 2538a, a lower boss 2538 b, and a second inclined surface 2538 c formed onthe lower boss 2538 b. The upper boss 2538 a and the lower boss 2538 bprotrude relative to the support end 2539. The second inclined surface2538 c has an inclination matching the inclination of the first inclinedsurface 2517.

FIGS. 5 and 6 are a perspective view and a cross-sectional view,respectively, of the camera body 200. As shown in FIGS. 5 and 6, thefixing frame 210 includes a first assembly hole 216 formed in an outerwall of the fixing frame 210 from outside to inside through the outerwall. The lens limiting assembly 100 comprises a lens assembly ring 20(see also, FIG. 3), and the lens assembly ring 20 is provided on thefixing frame 210. The lens assembly ring 20 includes a second assemblyhole 217 formed through the thickness of the lens assembly ring 20. Thepress key 251 and the first elastic member 255 pass through the firstassembly hole 216 and are received in the camera body 200. The limitingboss 253 and the second elastic member 257 pass through the secondassembly hole 217 and are received in the camera body 200. The interiorof the first assembly hole 216 is in communication with the interior ofthe second assembly hole 217, such that the press key 251, the firstelastic member 255, the limiting boss 253, and the second elastic member257 can be assembled with each other.

In some embodiments, a mounting column 2171 is formed corresponding tothe second assembly hole 217. In some embodiments, the mounting column217 is formed in the interior of the second assembly hole 217. As shownin FIG. 6, stepped surfaces 2173 are formed at two sides of the mountingcolumn 2171, and the mounting column 2171 further includes a via hole2174 provided in the center of the mounting column 2171. The shaft 2535can pass through the via hole 2174 to prevent the limiting boss 253 fromdeviating.

When the limiting structure 250 is being assembled into the camera body200, the support end 2539 of the limiting boss 253 is accommodatedbetween two snapping parts 2515 of the press key 251. The first snappingarm 2516 of each of the snapping parts 2515 passes through acorresponding one of the limiting ends 2538. The first inclined surfaces2517 of the first snapping arms 2516 respectively abut against thesecond inclined surfaces 2538 c of the lower bosses 2538 b of thelimiting boss 253. The clamping edges 2510 clamp to the correspondinglower bosses 2538 b, respectively. The first elastic member 255 iselastically abutted between the first surface 2512 of the key body 2511and the support end 2539. The second elastic member 257 is sheathed onthe shaft 2535, with one end of the second elastic member 257 abuttingagainst the first supporting part 2536 and the other end abuttingagainst the stepped surfaces 2173. When a user presses the press key251, the second inclined surface 2538 c and the first inclined surface2517 contact each other. The acting force along the first inclinedsurface 2517 can be decomposed into a pushing force perpendicular to thekey body 2511 and a downward pressure parallel to the key body 2511. Thepushing force presses the first elastic member 255 toward the supportend 2539, and the downward pressure acts on the second inclined surface2538 c and drives the limiting boss 253 to move downward so as to inturn compress the second elastic member 257 and release the limitingboss 253 from the lens 310. When the user no longer presses the presskey 251, the first elastic member 255 and the second elastic member 257recover from the deformation and drive the press key 251 and the post2531 to rebound. In the scenario that the lens 310 is in position, thepost 2531 can snap into the lens 310 to prevent the lens 310 fromrotating. During the rebound of the press key 251, the clamping edge2510 can clamp the lower boss 2538 b to prevent the press key 251 fromexcessively rebounding and releasing from the first assembly hole 216.

The lens limiting assembly 100 is used to lock the lens 310 and preventthe lens 310 from rotating or falling off of the camera body 200 in anaxial direction.

FIG. 7 is an exploded view of the lens limiting assembly 100. As shownin FIG. 7, the lens limiting assembly 100 comprises an elastic element10, the lens assembly ring 20, and a locking ring 30. The lens assemblyring 20 is arranged on the elastic element 10 and is accommodated in thelocking ring 30, and the locking ring 30 can rotate relative to the lensassembly ring 20.

The elastic element 10 comprises an elastic body 11 and a plurality ofelastic arms 12 on the elastic body 11. In some embodiments, the elasticbody 11 includes an annular strip spring, and three elastic arms 12 arearranged apart from each other at an inner side of the elastic body 11.Specifically, the elastic arms 12 extend from the inner side of theelastic body 11 downwardly in the direction of the axis of the elasticbody 11. Each of the elastic arm 12 comprises a first end 121 and asecond end 123, with the position of the first end 121 in the directionof the axis of the elastic body 11 being higher than the position of thesecond end 123 in the direction of the axis of the elastic body 11, suchthat a gap 13 is formed between the elastic arm 12 and the elastic body11 to accommodate a component of the locking ring 30. The elastic body11 is further provided with a first locating hole 14 and a snappingopening 16. In some embodiments, the snapping opening 16 is formed byrecessing the outer wall of the elastic body 11 inwardly. The shape ofthe snapping opening 16 corresponds to the shape of the limitingstructure 250 of the camera body 200 so as to be nested and snapped onthe limiting structure 250.

The lens assembly ring 20 comprises a first end face 21 and a second endface 23, which are arranged oppositely. The first end face 21 isarranged to face the elastic element 10, and the second end face 23 isarranged to face away from the elastic element 10. FIG. 9 is aperspective view showing the lens assembly ring 20 and the locking ring30 assembled together. As shown in FIG. 9, the first end face 21 isprovided with a second locating hole 211. The camera body 200 furthercomprises a locating pin 230 that can be inserted into the firstlocating hole 14 and the second locating hole 211 to connect the firstlocating hole 14 and the second locating hole 211 in series. In someembodiments, the locating pin 230 on the camera body 200 passes throughthe first locating hole 14 and the second locating hole 211 to fix theelastic element 10 and the lens assembly ring 20 to the camera body 200.Three receiving grooves 213 spaced apart from each other are furtherprovided on the first end face 21. The receiving grooves 213 can beformed by recessing the first end face 21 and is configured to receivecomponents on the locking ring 30. The second end face 23 is providedwith an assembly hole 231, which penetrates through the first end face21 and the second end face 23. The limiting boss 253 of the camera body200 passes through the assembly hole 231 to fix the position of the lens310. The second end face 23 is further provided with four bolt holes233. The camera body 200 further comprises four bolts 240 that can passthrough the four bolt holes 233 to fix the lens assembly ring 20 to thecamera body 200.

The inner wall of the lens assembly ring 20 includes a smooth surface,and is provided with three limiting parts 25 protruding towards theinner side and spaced apart from each other. A mounting part 27 isformed between every two of the limiting parts 25 such that the snappingbodies 314 of the lens 310 can pass through the mounting parts 27 and bemounted in the camera body 200.

The number of the elastic arms 12, the number of the receiving grooves213, and the number of the limiting parts 25 are not limited to theabove-described numbers, and can be chosen according to actual needs.

The locking ring 30 comprises a body 31, hooks 33, and anti-slip parts35. The hooks 33 are arranged at the inner side of the body 31, and theanti-slip parts 35 are arranged at the outer side of the body 31. Thebody 31 includes a circular ring structure, having a diameter largerthan the diameter of the lens assembly ring 20, such that the lensassembly ring 20 can be received in the body 31. The hooks 33 protrudeinwardly from the inner side of the body 31. In some embodiments, eachof the hooks 33 is approximately L-shaped and comprises a connectingpart 331 and a bent part 333, which are integrally arranged. Theconnecting part 331 is connected to the inner wall of the body 31. Oneend of the bent part 333 is connected to the connecting part 331, andthe other end of the bent part 333 extends straightly. As shown in,e.g., FIG. 7, each of the hooks 33 corresponds to one of the elasticarms 12 of the elastic element 10. A flange 335 is formed on one end ofthe bent part 333 and extends toward the corresponding elastic arm 12.The flange 335 is configured to abut against the corresponding elasticarm 12. FIG. 8 is an enlarged view of a portion of the hook 33. As shownin FIG. 8, an inclined surface 334 is formed at the side of the flange335 facing the connecting part 331 to connect the bent part 333 to theflange 335. FIG. 10 shows the lens limiting assembly 100 in an assembledstate. Referring to FIGS. 9 and 10 in conjunction, when the elasticelement 10 and the lens assembly ring 20 are received in the lockingring 30, the connecting part 331 and the bent part 333 of the hook 33are received in the corresponding receiving groove 213 of the lensassembly ring 20, and the flange 335 is accommodated in thecorresponding gap 13 of the elastic element 10 and abuts against theelastic arm 12. When the flange 335 moves relative to the elastic arm 12and abuts against the elastic arm 12, the inclined surface 334 contactsthe elastic arm 12. Further, the flange 335 moves along with theinclined surface 334 to abut against the elastic arm 12, therebyensuring a smooth fit between the flange 335 and the elastic arm 12. Theanti-slip part 35 may include an anti-slip thread, and is used to avoidslipping when a user rotates the locking ring 30.

Referring again to FIG. 6, when the lens limiting assembly 100 isassembled in the fixing frame 210, the elastic element 10 is nested andsnapped on the limiting structure 250 through the snapping opening 16.The lens assembly ring 20 is accommodated on the locking ring 30 andarranged on the elastic element 10. The locating pin 230 passes throughthe first locating hole 14 of the elastic element 10 and the secondlocating hole 211 of the lens assembly ring 20 to connect the elasticelement 10 and the lens assembly ring 20 in series. The limitingstructure 250 passes through the assembly hole 231 of the lens assemblyring 20 and can stretch and retract in a direction in which the limitingstructure 250 protrudes, so as to limit the position of the lens 310.The locking ring 30 is rotatably arranged on the outer side of the lensassembly ring 20, and the hooks 33 are received in the receiving grooves213 and abut against the elastic arms 12 of the elastic element 10.

FIG. 11 is a cross-sectional view of the camera 300 in an assembledstate. FIG. 12 is an enlarged view showing a portion of the camera 300.As shown in FIGS. 11 and 12, when the lens 310 is assembled into thelens assembly ring 20, each of the snapping bodies 314 slides into thelens assembly ring 20 through the corresponding mounting part 27. Thenthe lens 310 is rotated such that the snapping body 314 rotates to aposition below the corresponding limiting part 25 of the lens assemblyring 20 and the corresponding elastic arm 12 of the elastic member 10.Then the locking ring 30 can be rotated in one direction, such that theflange 335 of each of the hooks 33 slides from the second end 123 of thecorresponding elastic arm 12 to the first end 121 of the elastic arm 12.Since the position of the first end 121 of the elastic arm 12 is higherthan the position of the second end 123, the flange 335 presses theelastic element 10 while sliding, and the elastic arm 12 in turn pressesthe corresponding snapping body 314 of the lens 310 such that the lens310 moves in the direction towards the camera body 200. As such, thelens 310 can be locked to the camera body 200. When the locking ring 30rotates in the opposite direction, the flange 335 of the hook 33 slidesfrom the first end 121 of the corresponding elastic arm 12 to the secondend 123 to in turn release the elastic arm 12, such that the lens 310 isno longer locked to the camera body 200, and then the lens 310 can beremoved from the camera body 200.

The shape of the flange 335 of the hook 33 is not limited to that shownin the above figures, as long as the height of the flange 335 is greaterthan the distance between the first end 121 of the elastic arm 12 andthe elastic body 11.

The lens assembly ring 20 does not have to be fixed to the camera body200 by a bolt hole and a bolt. For example, in some other embodiments,the lens assembly ring 20 can be fixed to the camera body 200 usingadhesion.

FIGS. 13-15 show another exemplary lens limiting assembly 500 accordingto some other embodiments of the disclosure. As shown in FIGS. 13-15,the lens limiting assembly 500 comprises an elastic element 510, a lensassembly ring 520, and a locking ring 530. The lens assembly ring 520 isarranged on the elastic element 510, and is accommodated in the lockingring 530. The locking ring 530 is rotatable relative to the lensassembly ring 520.

The elastic element 510 includes an annular strip spring. Three elasticarms 512 spaced apart from each other extend from the inner side of thestrip spring. The elastic element 510 is provided with a first locatinghole 514 and a snapping opening 516. In some embodiments, as shown in,e.g., FIGS. 13-15, the snapping opening 516 is provided inwardly fromthe outer wall of the elastic element 510 and has a semi-circular shape.

A second locating hole 528 is provided on an end face of the lensassembly ring 520 that faces the elastic element 510. The secondlocating hole 528 includes a blind hole corresponding to the firstlocating hole 514 and is connected in series with the first locatinghole 514 by a locating pin of the camera body. The lens assembly ring520 is further provided with a fitting hole 529 (see also FIG. 16),which penetrates through the opposite end faces of the lens assemblyring 520 and fits with other components of the camera body. The lensassembly ring 520 is also provided with four bolt holes 5291 for fixingto the camera body. Three limiting parts 522 spaced apart from eachother extend from the inner wall of the lens assembly ring 520. Threereceiving grooves 527 spaced apart from each other are provided on anend face of the lens assembly ring 520 facing the elastic element 510.Each receiving groove 527 includes a first fitting face 524 provided atone side of the receiving groove 527. In some embodiments, the bottomface of the receiving groove 527 includes a planar surface. The firstfitting face 524 extends outwardly from the bottom face of the receivinggroove 527, and is inclined in a circumferential direction of the lensassembly ring 520. The limiting parts 522 include ribs arranged at theinner side of the lens assembly ring 520. The left and right sides ofeach limiting part 522 include smooth surfaces, and may directly serveas the inner wall face of the lens assembly ring 520 or as a slidinggroove face provided inwardly.

The locking ring 530 includes anti-slip grooves 538 provided on theouter side of the locking ring 530, and three hooks 532 spaced apartfrom each other and provided on the inner side of the locking ring 530.In some embodiments, each hook 532 has an approximately L-shapeextending from the inner wall of the locking ring 530. Each hook 532comprises a connecting part 5321 connected to the inner wall of thelocking ring 530 and a bent part 5322 connected to the connecting part5321. Each bent part 5322 includes a first surface facing the lensassembly ring 520 and a second surface opposite to the first surface. Anend portion of the first surface is inclined relative to the rest of thefirst surface, forming a second fitting face 534. The second surface ofthe bent part 5322 includes a planar surface 536. The second fittingface 534 has an inclination matching the inclination of the firstfitting face 524. Each hook 532 is received in a corresponding receivinggroove 527. The second fitting face 534 abuts against the first fittingface 524, and the planar surface 536 is configured to abut against thecorresponding elastic arm 512 of the elastic element 510.

When a lens including three snapping bodies spaced apart from each otherand provided on an outer side of the lens (see FIG. 17) is to beassembled into the lens assembly ring 520, the snapping bodies slideinto the lens assembly ring 520 along a smooth surface 526 of the lensassembly ring 520. Then, the lens can be rotated such that each snappingbody may rotate to a position below the corresponding limiting part 522of the lens assembly ring 520 and the corresponding elastic arm 512 ofthe elastic element 510. Then the locking ring 530 can be rotated in onedirection, such that the second fitting face 534 of each hook 532 moveson the corresponding first fitting face 524 and presses the elasticelement 510 while the height of the first fitting face 524 increases.Consequently, the elastic arms 512 of the elastic element 510 press thesnapping bodies of the lens in the direction towards the camera body,i.e., to lock the lens. When the locking ring 530 is rotated in anopposite direction, the second fitting face 534 of each hook 532 moveson the corresponding first fitting face 524 in an opposite direction,and the elastic element 510 is released while the height of the firstfitting face 524 decreases, such that the lens can rotate out.

FIGS. 16 and 17 show another exemplary camera body 600 according to someother embodiments of the disclosure. As shown in FIGS. 16 and 17, thecamera body 600 comprises a fixing frame 610 having a contact basemounting position 612 for assembling a lens having snapping bodiesprovided at the outer side of the lens. The lens limiting assembly 500can be mounted at the contact base mounting position 612. The fixingframe 610 further comprises a locating pin 621 and four bolts 622protruding from the fixing frame 610, and is provided with a telescopiclimiting structure 650. The elastic element 510 can be nested andsnapped with a circular nut 651 of the telescopic limiting structure 650through the snapping opening 516. The lens assembly ring 520 is fittedwith the locking ring 530 and arranged on the elastic element 510. Thelocating pin 621 passes through the first locating hole 514 of theelastic element 510 and passes into the second locating hole 528 of thelens assembly ring 520 to connect the elastic element 510 and the lensassembly ring 520 in series. The four bolts 622 pass into four boltholes 5291 of the lens assembly ring 520 to fix the lens assembly ring520. A post 652 of the telescopic limiting structure 650 protrudes outof the fitting hole 529 of the lens assembly ring 520, and can stretchand retract in a direction in which the post 652 protrudes and can limitthe position of the lens. The locking ring 530 is rotatably arranged ata periphery of the lens assembly ring 520.

FIGS. 18-20 show another exemplary camera 800 according to some otherembodiments of the disclosure. As shown in FIGS. 18-20, the camera 800comprises a lens 700 and the camera body 600. The lens 700 comprises alens barrel 712 comprising an assembly part 713. Three snapping bodies714 spaced apart from each other are provided on an outer wall of theassembly part 713. In some embodiments, each of the snapping bodies 714includes a flange. When the lens 700 is to be assembled into the lensassembly ring 520 of the lens limiting assembly 500, the snapping bodies714 slide along the smooth surface 526 of the lens assembly ring 520into the lens assembly ring 520. Then, the lens 700 can be rotated suchthat each of the snapping bodies 714 rotates to a position below thecorresponding elastic arm 512 of the elastic element 510. Then thelocking ring 530 can be rotated in one direction, such that the secondfitting face 534 of each of the hooks 532 moves on the correspondingfirst fitting face 524 and presses the elastic element 510 in thedirection perpendicular to a bottom face of the receiving groove 527while the height of the first fitting face 524 increases. Consequently,the elastic arms 512 of the elastic element 510 press the snappingbodies 714 of the lens 700 in the direction towards the camera body 600,i.e., to lock the lens 700 to the camera body 600. When the locking ring530 is rotated in an opposite direction, the second fitting face 534 ofeach hook 532 moves on the corresponding first fitting face 524 in anopposite direction, and the elastic element 510 is released while theheight of the first fitting face 524 decreases, such that the lens 700can rotate out of the camera body 600.

Contacts 620 are arranged in the camera body 600 and are configured tobe electrically coupled to, e.g., a driver in the lens 700 when the lens700 is fastened and assembled on the camera body 600.

The number of the elastic arms 512, the number of the receiving grooves527, the number of the limiting parts 522, the number of the hooks 532,and the number of the snapping bodies 714 are not limited to theabove-described numbers, and can be chosen according to actual needs.

Further, the shape of the hook 532 is not necessarily as shown in theabove figures, as long as the hook 532 can smoothly slide between thefirst fitting face 524 and the elastic element 510.

The lens assembly ring 520 does not have to be fixed to the camera body600 by a bolt hole and a bolt. For example, in some other embodiments,the lens assembly ring 520 can be fixed to the camera body 600 usingadhesion.

In summary, consistent with embodiments of the disclosure, the lenslimiting assembly comprises a locking ring. When the locking ring isscrewed on, the elastic element is pressed to tightly press the snappingbodies of the lens, so as to lock the lens to prevent the lens fromrotating and falling off in an axial direction. For the camera body andcamera provided in the embodiments of the present disclosure, because ofthe limiting assembly, the lens and the camera body can be locked toprevent the lens from rotating and falling off in an axial direction.

The above is merely some embodiments of the present disclosure and isnot intended to limit the scope of the present disclosure. Anytransformation for equivalent structures or equivalent procedures madeusing the contents of the description and the accompanying drawings ofthe present disclosure or applied in other relevant technical fieldsdirectly or indirectly should likewise be similarly encompassed in thescope of the present disclosure.

What is claimed is:
 1. A camera body comprising: a fixing frame having acontact base mounting position; and a lens limiting assembly arranged atthe contact base mounting position and comprising: an elastic elementarranged on the contact base mounting position; a lens assembly ringarranged on the elastic element; and a locking ring arranged outside thelens assembly ring and configured to abut against and press the elasticelement when the locking ring rotates in one direction.
 2. The camerabody of claim 1, wherein: the elastic element includes an annular stripspring comprising an elastic body and an elastic arm, the elastic armextending from an inner side of the elastic body inward and downwardalong an axis of the elastic body, and the locking ring comprises aflange abutting against the elastic arm.
 3. The camera body of claim 2,wherein: the elastic arm comprises a first end and a second end, aposition of the first end in the direction of the axis of the elasticbody being higher than a position of the second end in the direction ofthe axis of the elastic body, and the flange is accommodated in a gapformed between the elastic arm and the elastic body.
 4. The camera bodyof claim 2, wherein: the lens assembly ring comprises an accommodatinggroove, the locking ring comprises: a body; and a hook protrudinginwardly from the body and accommodated in the accommodating grove, thehook comprising: a connecting part connected to an inner wall of thebody; and a bent part, one end of the bent part being connected to theconnecting part, another end of the bent part extending straightly, andthe flange being formed at a tail end of the bent part and extendingtoward the elastic arm.
 5. A camera comprising: a lens including asnapping body provided on an outer side of the lens; and a camera bodycomprising: a fixing frame having a contact base mounting position; anda lens limiting assembly arranged on the contact base mounting positionand comprising: an elastic element arranged on the contact base mountingposition; a lens assembly ring arranged on the elastic element, thesnapping body being configured to be snapped below the elastic elementwhen the lens is assembled in the lens assembly ring; and a locking ringarranged outside the lens assembly ring and configured to abut againstand press the elastic element when the locking ring rotates in onedirection, and the elastic element pressing the snapping body to lockthe lens.
 6. The camera of claim 5, wherein: the elastic elementincludes an annular strip spring comprising an elastic body and anelastic arm, the elastic arm extending from an inner side of the elasticbody inward and downward along an axis of the elastic body, and thelocking ring comprises a flange abutting against the elastic arm.
 7. Thecamera of claim 6, wherein: the elastic arm comprises a first end and asecond end, a position of the first end in the direction of the axis ofthe elastic body being higher than a position of the second end in thedirection of the axis of the elastic body, and the flange isaccommodated in a gap formed between the elastic arm and the elasticbody.
 8. The camera of claim 6, wherein: the lens assembly ringcomprises an accommodating groove, the locking ring comprises: a body;and a hook protruding inwardly from the body and accommodated in theaccommodating grove, the hook comprising: a connecting part connected toan inner wall of the body; and a bent part, one end of the bent partbeing connected to the connecting part, another end of the bent partextending straightly, and the flange being formed at a tail end of thebent part and extending toward the elastic arm.
 9. The camera of claim8, wherein the flange includes an inclined surface formed on a side ofthe flange facing the connecting part, the inclined surface connectingthe flange and the bent part.
 10. The camera of claim 5, wherein thelens assembly ring comprises a fitting face arranged on an end face ofthe lens assembly ring facing the elastic element, the fitting facebeing inclined in a circumferential direction of the lens assembly ring.11. The camera of claim 10, wherein: the fitting face is a first fittingface, the lens assembly ring is accommodated in the locking ring, theend face of the lens assembly ring including a receiving grooveconnected to the fitting face, and the locking ring comprises a hookextending from an inner side of the locking ring and being received inthe receiving groove, the hook including a second fitting face abuttingagainst the first fitting face and arranged at an end of one surface ofthe hook facing the lens assembly ring, another surface of the hookopposite to the second fitting face including a planar surface abuttingagainst the elastic element.
 12. The camera of claim 11, wherein thehook comprises a connecting part connected to the inner side of thelocking ring and a bent part bending and extending from the connectingpart, the second fitting face being arranged at an end of a surface ofthe bent part facing the lens assembly ring, and the planar surfacebeing arranged on another surface of the bent part opposite to thesecond fitting face.
 13. The camera of claim 5, wherein the lensassembly ring comprises a plurality of limiting parts spaced apart fromone another, a mounting part being formed between two adjacent limitingparts, and the snapping body being configured to enter the lens assemblyring via the mounting part to be snapped below one of the limitingparts.
 14. The camera of claim 5, wherein: the fixing frame includes alocating pin and a plurality of bolts, the elastic element includes afirst locating hole, the lens assembly ring comprises a first end faceand a second end face arranged oppositely, the first end face includinga second locating hole, and the second end face including a plurality ofbolt holes, the locating pin passes through the first locating hole andthe second locating hole, and the bolts correspondingly pass through thebolt holes.
 15. The camera of claim 14, wherein: the elastic elementincludes a snapping opening, the lens assembly ring further includes anassembly hole penetrating through the first end face and the second endface, and the fixing frame further comprises a limiting structure nestedand engaged with the snapping opening, the limiting structure comprisinga limiting boss passing through the assembly hole to limit a position ofthe lens.
 16. The camera of claim 5, wherein the fixing frame includes:a first assembly hole provided inwardly on an outer wall of the fixingframe; a second assembly hole provided on a side of the fixing framefacing the lens and in communication with the first assembly hole; and alimiting structure comprising a press key, a first elastic member, alimiting boss, and a second elastic member, the press key and the firstelastic member being accommodated in the first assembly hole, and thelimiting boss and the second elastic member being accommodated in thesecond assembly hole.
 17. The camera of claim 16, wherein the press keycomprises: a key body; and two snapping parts spaced apart from eachother and protruding from the key body, each of the snapping partscomprising: a first connecting arm comprising an inclined surfaceabutting against the limiting boss; and a second connecting armconnected with the first connecting arm and comprising a clamping edgeextending from the inclined surface in a direction parallel to the keybody, the clamping edge clamping the limiting boss.
 18. The camera ofclaim 16, wherein: the limiting boss comprises: a bracket comprising asupporting part; and a post and a shaft arranged at two sides of thefirst supporting part, a mounting column is formed corresponding to thesecond assembly hole, the mounting column including stepped surfacesformed at two sides of the mounting column, the second elastic member issheathed on the shaft and abuts between the supporting part and thestepped surfaces, and the shaft passes through a via hole in themounting column.
 19. The camera of claim 18, wherein: the supportingpart is a first supporting part, the bracket further comprises a secondsupporting part including two limiting ends and a support end, the presskey comprises: a key body; and two snapping parts spaced apart from eachother and protruding from the key body, each of the snapping partscomprising a first inclined surface abutting against the limiting boss,the first elastic member abuts between the key body and the support end,each of the limiting ends comprises an upper boss and a lower bossarranged oppositely, the lower boss including a second inclined surfaceabutting against the first inclined surface, each of the snapping partspasses through a corresponding one of the limiting ends, and each of theclamping edges clamps a corresponding one of the lower bosses.
 20. Thecamera of claim 5, wherein the lens comprises a lens barrel, the bottomend of the lens barrel including an assembly part, and a plurality ofsnapping bodies being arranged apart from each other on an outer wall ofthe assembly part.